CN216078387U

CN216078387U - Valve seat and valve structure comprising same

Info

Publication number: CN216078387U
Application number: CN202122357465.0U
Authority: CN
Inventors: 戚茂波
Original assignee: Wuxi Yadi Fluid Control Technology Co ltd
Current assignee: Wuxi Yadi Fluid Control Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-18
Anticipated expiration: 2031-09-28

Abstract

The utility model relates to a valve seat and a valve structure comprising the valve seat, wherein the valve seat comprises a main valve seat and a secondary valve seat which is arranged far away from the main valve seat, the main valve seat comprises a main valve seat body with an outlet passage and a first part connected with the main valve body, and the outer side of the first part is provided with a first surface; the auxiliary valve seat comprises an auxiliary valve seat body and a second part connected with the auxiliary valve seat body, and the outer side of the second part is provided with a second surface. The utility model also provides a valve structure, which comprises the valve seat and a valve body connected with the valve seat. The spheroid sets up in the inside of valve body, and the spheroid has partly to be connected with the valve rod. Through set up the first portion that has the first face on main valve seat body to and set up the second portion that has the second face on the sub-valve seat body, and then can realize contacting with the spheroid of gyration and get rid of the crystallization and the incrustation scale that adsorb on the spheroid surface, and then guaranteed that the spheroid is vice lasting with main valve seat, sub-valve seat, and effectively prevent that the spheroid from being blocked.

Description

Valve seat and valve structure comprising same

Technical Field

The utility model relates to the technical field of valve equipment, in particular to a valve seat and a valve structure comprising the same.

Background

A ball valve is a device for the regulation and control of fluids, which is particularly suitable for media containing fibres, fine solid particles and the like. The conventional ball valve has the following problems:

when the working conditions of easy crystallization, scaling, solid particle and impurity contained in the medium are met, the crystals, the structures and the like are easily adsorbed on the sealing surface, so that the service life of the sealing pair is shortened, and the valve is blocked.

Crystallization and scaling between the valve rod and the valve body are more, so that the flexible action of the valve rod cannot be ensured, and the use effect is influenced.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a valve seat and a valve structure including the same, which solves one or more problems of the prior art.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a valve seat comprises a main valve seat and a secondary valve seat arranged far away from the main valve seat, wherein

The main valve seat comprises a main valve seat body with an outlet passage and a first part connected with the main valve body, and the outer side of the first part is provided with a first surface;

the auxiliary valve seat comprises an auxiliary valve seat body and a second part connected with the auxiliary valve seat body, and a second surface is arranged on the outer side of the second part.

Furthermore, an elastic piece is arranged on the auxiliary valve seat body.

Further, a first seal member is provided at one portion of the sub-seat body, and a second seal member is provided at the other portion of the sub-seat body.

Correspondingly, the utility model also provides a valve structure, which comprises the valve seat and a valve body connected with the valve seat, wherein the valve body is provided with a valve inner cavity, a ball body with a passage is arranged in the valve body and between the main valve seat and the auxiliary valve seat, and a part of the ball body is connected with the valve rod so as to realize the rotation of the ball body; and a packing assembly is arranged on the outer side of the valve rod.

Further, the valve rod comprises a first part and a second part connected with the first part, a thrust pad is connected to the outer side of the first part, one part of the thrust pad abuts against the second part, and the other part of the thrust pad abuts against the packing assembly.

Further, a third seal is disposed outside the second portion.

Furthermore, the valve body is provided with a first hole communicated with the interior of the valve body, a fastening piece is rotatably arranged in the first hole, and a fourth sealing piece is further arranged on the fastening piece.

Furthermore, the packing assembly comprises a packing box, one part of the packing box is connected with the valve body, and a packing base, packing, a packing pressing sleeve and a packing pressing cover are sequentially arranged in the packing box and on the outer side of the valve rod.

Further, another part of the stuffing box is connected with a bracket.

Compared with the prior art, the utility model has the following beneficial technical effects:

the utility model can realize the contact with the revolving sphere through the first surface and the second surface and remove the crystal, scale and solid particles adsorbed on the surface of the sphere, thereby ensuring the durability of the sealing pair between the sphere and the main valve seat and the auxiliary valve seat and effectively preventing the sphere from being blocked.

Furthermore, the valve body is provided with a first hole, foreign matters or dirt removed by the first part and the second part can be trapped at the bottom of the inner cavity of the valve and then flow out of the hole, and the phenomenon that the valve is blocked due to accumulation of the foreign matters or the dirt in the inner cavity of the valve is avoided.

And (III) further, a first sealing piece and a second sealing piece are arranged at the joint of the auxiliary valve seat body and the valve body, so that the connection sealing property of the auxiliary valve seat body and the valve body can be ensured.

And (IV) further, the elastic piece is arranged to drive the auxiliary valve seat to flexibly move, so that the auxiliary valve seat is always stressed and is abutted against the outer side of the ball body, and the other part of the ball body is always abutted against the main valve seat through the force transmission effect, so that the necessary sealing specific pressure of the main valve seat is provided, and the rigid connection and clamping of the ball body and the valve seat are avoided.

And (V) further, the valve rod sealing ring is arranged to ensure that the crystallization and scaling conditions at the matching position of the valve rod and the valve body are reduced, and further ensure that the valve rod acts flexibly.

Drawings

Fig. 1 shows a schematic cross-sectional view of a valve seat and a valve structure including the valve seat according to an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating a valve seat and a valve structure including the valve seat according to an embodiment of the present invention in a fully opened state.

Fig. 3 is a schematic diagram illustrating a valve seat and a valve structure including the valve seat according to an embodiment of the present invention in a half-open state.

Fig. 4 is a schematic diagram illustrating a fully closed state of a valve seat and a valve structure including the valve seat according to an embodiment of the present invention.

In the drawings, the reference numbers: 1. a valve body; 100. a first hole; 102. a valve inner cavity; 2. a sphere; 200. a passage; 3. a main valve seat; 300. a main valve seat body; 301. a first part; 3011. a first side; 302. an outlet channel; 4. a secondary valve seat; 400. a sub valve seat body; 401. a first seal member; 402. a second section; 4021. a second face; 403. an elastic member; 404. a second seal member; 405. a second hole; 500. a thrust pad; 501. a third seal member; 6. a stuffing box; 700. a filler base; 701. a filler; 702. pressing and sleeving the filler; 703. a packing gland; 8. a fastener; 9. a valve stem; 900. a first portion; 901. a second portion; 10. a support; 11. and a fourth seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, a valve seat and a valve structure including the valve seat according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

In order to describe the structure of the sealing structure for the valve stem more clearly, the present invention defines the terms "distal end" and "proximal end", specifically, the "distal end" indicates the medium inflow end, the "proximal end" indicates the fluid outflow end, and taking fig. 1 as an example, the right side of the valve body in fig. 1 is the distal end, and the left side of the valve body in fig. 1 is the proximal end.

Referring to fig. 1, the valve seat of the present invention includes a main valve seat 3 and a sub valve seat 4 disposed away from the main valve seat 3.

Referring to fig. 1 and 2, the main valve seat 3 includes a main valve seat body 300 and a first portion 301 connected to the main valve seat body 300, the first portion 301 is integrally connected to the main valve seat body 300, the first portion 301 is formed by extending at a distal end of the main valve seat body 300, the first portion 301 has a first surface 3011, and the first surface 3011 is configured to fit with an outer side of the ball 2. The main valve seat body 300 is also provided with an outlet passage 302.

With continued reference to fig. 1 and 2, the counter seat 4 includes a counter seat body 400 and a second portion 402 connected to the counter seat body 400, the second portion 402 is integrally connected to the counter seat body 400, the second portion 402 is formed to extend from the proximal end of the counter seat body 400, the second portion 402 has a second surface 4021 thereon, and the second surface 4021 is also adapted to fit the outer side of the ball 2.

Accordingly, in other embodiments of the present invention, the first portion 301 and the main valve seat body 300 may be detachably connected, and similarly, the second portion 402 and the auxiliary valve seat body 400 may be detachably connected.

Further, in the valve seat and the valve structure including the valve seat according to the embodiments of the present invention, the first face 3011 is any one of a concave face and an arc face, and preferably, the first face 3011 is an arc face in this embodiment. Similarly, the second surface 4021 is also any one of a concave surface and an arc surface, and preferably, the second surface 4021 is also an arc surface.

Further, with reference to fig. 1 and fig. 2, a second hole 405 is formed in the sub-valve seat body 400, and an elastic member 403 is disposed in the second hole 405. Wherein the elastic member 403 is preferably a spring, one part of which abuts against the hole bottom surface of the second hole 405 and the other part of which abuts against the valve body 1. Through setting up the elastic component 403 can guarantee the free activity of auxiliary valve seat 4, rely on the elastic deformation volume drive of elastic component 403 auxiliary valve seat 4 activity, and then make the second face 4021 of auxiliary valve seat 4 all the time with the lateral surface butt of spheroid 2, the setting of elastic component 403 not only provides the necessary sealed specific pressure of main valve seat 3, but also has avoided the appearance of spheroid 2 and the dead circumstances of valve seat rigid connection card.

Further, with continued reference to fig. 1 and 2, a first seal 401 is disposed at the proximal end of the counter seat body 400, and a second seal 404 is disposed at the distal end of the counter seat body 400. The first sealing element 401 and the second sealing element 404 are preferably O-ring type sealing elements, and annular grooves for mounting the O-ring type sealing elements are formed at the proximal end and the distal end of the auxiliary valve seat body 400. The arrangement of the first sealing element 401 and the second sealing element 404 can ensure that the medium cannot flow into the matching part of the auxiliary valve seat 4 and the valve body 1, and the risk of crystallization and scaling at the part can be reduced.

Correspondingly, the utility model also provides a structure, the valve structure comprises the valve seat and a valve body 1 connected with the valve seat, and the valve body 1 is provided with a valve inner cavity 102. Specifically, please refer to fig. 1, the distal end of the main valve seat body 300 in the valve seat is connected to the proximal end of the valve body 1 through a fastener, the sub valve seat body 400 in the valve seat is disposed in the valve inner cavity 102, the valve inner cavity 102 forms a step in the valve body 1, and the distal end of the sub valve seat body 400 in the valve seat abuts against the step. A ball 2 having a passageway 200 is disposed between the distal end of the main valve seat body 300 and the proximal end of the sub-valve seat body 400, and the outer side of the ball 2 at rest is fitted with the first and

second faces

3011 and 4021, the passageway 200 being a through hole that passes through the ball 2.

Further, with continued reference to fig. 1, a portion of the ball 2 is connected to the valve rod 9, so that the valve rod 9 can control the ball 2 to rotate in the valve cavity 102, thereby opening and closing the medium in the valve body 1. A packing assembly is also provided on the outside of the valve stem 9.

Specifically, with continued reference to fig. 1, the valve rod 9 includes a first portion 900 and a second portion 901 connected to the first portion 900, wherein the first portion 900 is used to penetrate through the valve body 1, and the second portion 901 is used to connect to the ball 2.

Further, with continued reference to fig. 1, a thrust washer 500 is connected to the outside of the first portion 900, the thrust washer 500 is preferably a stem seal, the bottom of the stem seal abuts against the top of the second portion 901, and the top of the stem seal abuts against a portion of the packing assembly. The valve rod sealing ring is arranged to ensure that a medium does not enter the matching position of the valve rod 9 and the valve body 1, so that the crystallization and scaling risks are reduced, and the flexible action of the valve rod 9 is effectively ensured.

Further, with continuing reference to fig. 1, a third sealing member 501 is further disposed outside the second portion 901, and the third sealing member 501 ensures that the second portion 901 and the inner wall of the through portion of the valve body 1 through which the second portion 901 penetrates are always sealed, so as to avoid medium inflow and effectively reduce risks of crystallization and scaling.

Preferably, the thrust pad 500 and the third seal 501 are both O-rings.

Further, with continued reference to fig. 1, the bottom of the valve body 1 is provided with a first hole 100 capable of communicating with the valve cavity 102 inside the valve body 1, so that the foreign matters or dirt removed by the first portion 301 and the second portion 402 are trapped at the bottom of the valve cavity 102, and the foreign matters or dirt can be discharged through the first hole 100, thereby preventing the foreign matters or dirt from accumulating at the valve cavity 102 and causing the valve to be stuck.

Further, the first hole 100 may be sealed by a fastening member 8, the fastening member 8 may be rotatably disposed in the first hole 100, specifically, the fastening member 8 is in threaded connection with the first hole 100, the first hole 100 has an internal thread, the fastening member 8 is a bolt, that is, an external thread, and a fourth sealing member 11 is disposed on an outer side of one end of the fastening member 8, so as to ensure sealing of a connection between a hole wall of the first hole 100 and the fastening member 8. Preferably, the fourth seal 11 is also an O-ring seal.

Referring to fig. 1, the following describes a specific structure of the packing assembly as follows:

the packing assembly comprises a packing box 6, the bottom of the packing box 6 is hermetically connected with the top of the valve body 1 through a sealing element, the valve rod 9 penetrates through the packing box 6, and a packing base 700, a packing 701, a packing pressing sleeve 702 and a packing pressing cover 703 are sequentially arranged on the outer side of the valve rod 9 in the packing box 6. The stuffing box 6 is connected at the top with a support 10.

The specific working process of the valve structure is as follows:

referring to fig. 2, in the static state, the passage 200 of the ball 2 is in communication with the valve cavity 102 of the valve body 1 and the outlet channel 302 of the main valve seat 3, so that the inflow and outflow of the medium can be realized.

Referring to fig. 3, when the ball 2 is controlled by the valve rod 9 to perform a rotation motion, the outer spherical surface of the ball 2 is always in contact with the first surface 3011 of the first portion 301 and the second surface 4021 of the second portion 402, and further the crystallization medium, the scale and other solid particles adsorbed on the surface of the ball 2 are removed by the first surface 3011 and the second surface 4021, so as to ensure that the life of the sealing pair between the main valve seat body 300 and the ball 2 and the life of the sealing pair between the sub valve seat body 400 and the ball 2 are long, and effectively prevent the ball 2 from rotating and jamming.

Referring to fig. 4, when the ball 2 is controlled to rotate to another direction by the valve rod 9, the passage 200 of the ball 2 is not communicated with the valve cavity 102 and the outlet channel 302, so as to achieve the sealing of the medium.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A valve seat, characterized by: comprising a main valve seat and a secondary valve seat arranged away from the main valve seat, wherein

The main valve seat comprises a main valve seat body with an outlet passage and a first part connected with the main valve seat body, and the outer side of the first part is provided with a first surface;

the auxiliary valve seat comprises an auxiliary valve seat body and an auxiliary valve seat body

A second portion connected, the second portion having a second face on an outer side thereof.

2. A valve seat as defined in claim 1, wherein: and the auxiliary valve seat body is also provided with an elastic piece.

3. A valve seat as defined in claim 2, wherein: a first seal is provided on one portion of the sub-seat body, and a second seal is provided on the other portion of the sub-seat body.

4. Valve structure, its characterized in that: the valve structure comprises a valve seat according to any one of claims 1 to 3 and a valve body connected with the valve seat, wherein the valve body is provided with a valve inner cavity, a ball with a passage is arranged in the valve body and is arranged between a main valve seat and a secondary valve seat, and a part of the ball is connected with a valve rod so as to realize the rotation of the ball; and a packing assembly is arranged on the outer side of the valve rod.

5. The valve structure of claim 4, wherein: the valve rod comprises a first part and a second part connected with the first part, a thrust pad is connected to the outer side of the first part, one part of the thrust pad abuts against the second part, and the other part of the thrust pad abuts against the packing assembly.

6. The valve structure of claim 5, wherein: a third seal is also provided on the outside of the second portion.

7. The valve structure of claim 4, wherein: the valve body is provided with a first hole communicated with the interior of the valve body, a fastening piece is rotatably arranged in the first hole, and a fourth sealing piece is further arranged on the fastening piece.

8. The valve structure of claim 4, wherein: the packing assembly comprises a packing box, one part of the packing box is connected with the valve body, and a packing base, packing, a packing pressing sleeve and a packing pressing cover are sequentially arranged in the packing box and on the outer side of the valve rod.

9. The valve structure of claim 8, wherein: the other part of the stuffing box is connected with a bracket.